<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <input type="text">
    <script>
        const input =document.querySelector('input');
        // input.addEventListener('focus', function () {
        //     console.log('获得焦点');
        // });
        // input.addEventListener('blur', function () {
        //     console.log(input.value);
        // });



        input.addEventListener('keydown', function () {
            console.log('键盘按下了');
        });
        input.addEventListener('keyup', function () {
            console.log('键盘弹起下了');
        });
    </script>
</body>
</html>